Question: What is the tributary of the reservoir on this river of Sulak River?
Paraphrase: What is the tributary of the reservoir on this river of Sulak River?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q770781 wdt:P469 ?X . ?X wdt:P974 ?answer}
Answer: Volga, Ural River, Terek River, Kura River, Kuma, Sardab River, Atrek River, Emba River, Sulak River, Samur River, Sefid Rud, Volga Delta, Pirsaat River, Kura, Astarachay, Sumgayit River, Rubas, Shura-Ozen River, Ulluchay River, Belinsky Bank, Buzan, Vilesh, Gorganrud, Kirvoy Bank, Qudyalçay, Qusar River, Samur-Absheron channel, Stary Igolkinsky Bank, Yurinsky Bank, Tajan River, Babol River, Talar River, Siah Rud (Mazandaran), Kamyzyak, Darvagchay, Haraz River, Karachay river, Neka River (Iran)